Fortified homes of highland warriors that are still in use today.

The last standing example of an ancient district's teatime tradition.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The decaying remains of a once-luxurious Soviet spa town.

You'll find just about anything in this funky Tbilisi flea market.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Small church on top of a huge rock column.

These Stalin-era industrial 'death traps' hang lifeless above the city

Fast food feels like fine dining at this award-winning modern Georgian building.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Ancient rock-hewn town that witnessed key events of Georgian history.

Underground monastery and fortress.

One of the most controversial statues in Romania is an emperor with no clothes.

This once-derelict building is now one of the most beautiful bookstores in the world.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Wars fought and wars won are remembered by these abandoned bunker ruins.

The gutted remains of this Estonian mansion are a monument to a tragic love.

3,000 market stands in five former Zeppelin hangars.

"There's nothing there," and other lies the KGB told us.

This abandoned beacon is moving closer and closer to the sea.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.